Charles p



(N0 Modeh) O.'P. BIR-NER.

' BICYCLE BRAKE. No. 600,474. Patented Mar. 8, 1898.

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Nrrn STATES ATENT OFFICE.

CHARLES P. BIRNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE MONARCl-I CYCLE MANUFACTURING COMPANY, OF SAME PLACE.

BICYCLE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 600,474, dated March 8, 1898.

Application filed June '7, 1897. Serial No. 639,768. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES P. BIRNER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Bicycle-Brakes; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings,

forming a part of this specification.

The present invention relates to that type of brakes for bicycles in which an arm pivoted at one end to the steering-frame carries at the other end an elastic brake roll or head adapted to engage the tire, motion being imparted to the brake-arm by a connecting-arm and a pivoted brake-lever arranged adjacent to the steering-handles and within convenient reach of the rider.

The object of the present invention is to provide a simple, durable, and effective means for the attachment of the base or head to which the brake-carrying arm is fulcrumed and which is adapted to permit of the ready 2 5 attachment and detachment of the brake-arm when required. I attain such object by the construction and arrangement of parts illustrated in the accompanying drawings, in which- I Figure 1 is a detail elevation, partly in axial section, illustrating my present invention as applied to the steering-head of a safety-bicyole; Fig. 2, a detail bottom view of the same.

Similar numerals of refence indicate like parts in both views.

Referring to the drawings, 1 represents the lower end of the stem or arbor of the steering-handles, steering-post of a bicycle; 2, the lower end of the stem or arbor of the steering-handles or fork, and 3 the crown by which the said stem or arbor 2 is connected to the fork sides of the bicycle in the usual manner.

In the present improvement the lower end of the stem or arbor 2 is provided with diametrically opposite orifices adapted to receive a cross bar or rod 4, which is held in place by the crown 3, fitting the outside of the stem,

to retain said bar or rod 4 in proper position, said bar or rod being provided with a centrally-located screw-threaded orifice for the reception of the attaching-screw hereinafter described.

5 is a head fitting the lower end of the sleeve or arbor 2 and provided with a marginal rim or flange 6, by means of which it has bearing 5 5 against the lower end of said stem or arbor.

7 is the attaching-screw heretofore mentioned, the screw-threaded shank of which passes through a central orifice in the head 5 to screw into the cross bar or rod 4 to effect astrong and substantial attachment of the head 5 in place.

8 are pendent legs upon the head 5, between which is pivoted the rear end of the brakearm 9, the opposite end of which carries the elastic brake roll or pad 10, of any usual form.

11 is the operating-arm of the brake-arm 8, which has the usual connection to the operating brake-lever, which may be of any ordinary construction and as it forms no part of the present invention is not illustrated in the drawings.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

The combination in a bicycle-brake, of the steering stem or arbor having diametrically opposite orifices near its lower end, a cross bar or rod arranged in said orifices, the forkcrown fitting the end of the stem or arbor to retain said cross bar or rod in place, a pivothead secured to the lower end of said arbor,

a central attaching-screw passing through said head and screwing into the cross bar or rod, pendent lugs on said head, and the brakearm pivoted between said lugs, substantially as set forth.

In testimony whereof witness my hand this 2d day of June, 1897.

CHARLES P. BIRNER. 

